Lock



LOCK

Filed Jan. 9, 1925 gar/111111,

INVENTOR A.E. LaMam/z ATTORNEY Patented Aug. 31, 1926.

warren s'rras ALBERT E. LA MARSH, 01F BBGOKLYN, NEW" YORK.

LopK.

Application filed January 9, 1925. Serial No. 1,368.

The main object of this invention is to provide a door lock mounted on ahinge which cooperates with the hasp and locks the door in closedposition by cooperating with said hasp. In the usual design, the hasp isexposed and may be removed by a hack saw or similar tool by anunauthorized person. lVith this device, however, the lock is mounted on.the hinge and covers the hasp in locked position so that access may notbe gained to the hasp to sever or damage the same.

This and other objects will become apparent in the description below, inwhich charactors of reference refer to like-named parts in the drawing.

Referring briefly to the drawing, Figure 1 is a top plan View of thedevice, showing the same mounted on a door.

Figure 2 is a sectional elevational view of the same.

Figure 3 is a fragmentary sectional elevational view similar to Figure2, showing the lock in released position.

Figure 4 is a sectional elevational view thru the rear portion of thelocking device, the section being taken on line 11 of Fig ure 1.

Figure 5 is a perspective view of the key 30 operated trip lever.

Referring in detail to the drawing, the

- numerals and 11 indicate a pair of doors which are hinged at theiropposite sides. On the door 10, a hinge plate 12 is rigidly mounted andis provided with a hinge sleeve 13 at one end which cooperates with apair of hinge sleeves 1 1, part of a floating hinge plate 15. The hingeplate 15 extends from the sleeves 14 across the junction of the doors 10and 11 and at its opposite end has a slot 16 thru which a hasp 17 isadapted to extend. Said hasp is anchored on the surface of the door 11by a block 18 and is re tained in such position by the bracket that itmay be slid horizontally therein to permit a slight adjustment of thehasp. It may be noted that the hinge plate is pivoted on the door 10 andthe hasp is mounted on the opposite door 11, thus when the hinge plateand hasp are interlocked, the doors 10 and 11 may not be opened. Thelong hinge plate 15 has a casing which is open at the bottom and isprovided with side walls 19 and a top 20. The casing has an internalshoulder formed on the walls 19 and lugs 21. are raised on the surfaceof the hinge .roof 20 of the plate 15 and receive screws to rigidlysecure the casing on the hinge plate 15. The casing forms the chamber 22between the roof and the upper surface of the hinge plate 15, and inthis chamber, a locking plunger 28 is slidably mounted between a pair ofpins 2 1 and 25. The forward end of the plunger 23 has an inclined nose26 which is rounded at the edge and is adapted to contact with the haspto cause theplunger to retract when the hinge plate is being rotateddownwardly toward the hasp. The rear end of the plunger has a plate 27secured thereto and extends rearwardly having an up-turned end 28 at theend which cooperates with a flat resilient spring 29, the latter beingmounted above the up-turned end 28 and aids in retaining the plunger andmember 27 in slidable position on the surface of the hinge plate 15.From the forward end of the bracket 27, an arm 30 extends sidewise andis provided with an opening at its outer end which is slidably mountedon a fixed rod 31, the rod being retained in place in the ears 32 whichextends upwardly from the ends of a plate 38. The rod 31 has a coilspring 34: mounted thereon and is adapted to urge the arm 30 of thebracket 27 forwardly so that the plunger normally is engaged in the loopof the hasp 17. Adjacent to and to one side of the bracket 27, a stud 35projects upwardly and is exposed thru a key opening 36 formed in thecasing. mounted on the surface of the long hinge plate 15 and has a keyoperated lever 37 rotatably mounted thereon. On one side of the lever,an open channel 38 is created by an angular extension 89. Into thischannel, the width and the length of the key registers so that if aperson were to attempt to rotate the lever with a key which does not fitinto this channel, he would have great diiiiculty.

In using the lock when the same is in closed position as indicated inFigures 1 and 2, in which figures, the plunger 23 is shown inserted intothe loop of the hasp 17, it is necessary to unlock the device in orderto 1 open the doors. Unlocking is accomplished by the key operated meanswhich is actuated by the key 40 being inserted thru the key opening 36over the stud, it being noted that a hollow key is necessary with thislook. The 110 end 41 of the key is of an exact size which would fit intothe open channel 38 and this This stud is rigidly on end ll is fittedinto said channel after the key has been inserted thru the root andpartly rotated so that it rests upon the surface of the lever 37. Thekey is further rotated until the portion ll of said key enters into thechannel 38 after Whichsaid key may be rotated in a counter-clockwisedirection, and when so doing, will engage the rip-turned end 28 of thebracket 37 and thus retract the plunger so that the nose 26 isdisengaged from the hasp and the entire lock may be rotated about thehinge sleevesin the inani'aer shown in Figure 3, after which the doorsmay be independently opened;

I claim A device of the class described comprisinga folding hinge havinga projecting end covering the hinge plate anchored to the door or thelike, a hasp cooperating with said projecting end and normally coveredby the latter, a casing mounted on the projectingend or said hingeadapted to receive aid hasp, a plunger slidable in said casing andadapted to engage said hasp, a pin on each side of said plunger forminga guide for the latter, said plunger being slidable in said casing, abracket slidable in said casing and fixed to said plunger, an armextending at right angles from said bracket, a rod fix ,d to said armand extending longitudi hall in the casing ears rigid in saidcasingsupporting said rod, and a coil spring i'nounted on said rodengaging said arm on the bracket-and adapted to yieldably extend saidplunger, said ears and rod being oil'- set from the bracket, a studmounted on said hinge plate, a key operated lever rotatable on saidstud, a curved nose on said lever engageable with said bracket whenretracting said plunger from engagement with the haspn In testimonywhereof I affix in signature.

ALBERT E. LA MARSH.

